how to show constellation of ofdm?

[mackenzie fencyParticipant]

Hi:
recently I uesd optisystem to build a CO-OFDM system with FSO channel, but I cannot get the OSNR and the constellation.
About the OSNR, the optical power meter after the FSO channel shows the noise power equals zero.
About the constellation, I dont know how to show the constellation after the OFDM demodulator. I see someone used a subsystem to show constellation, but I dont know what the subsystem has. Is it another communication system?

[Ahmad AtiehModerator]

Dear Mackenzie,
You may access the Constellation of the OFDM Demodulator through the Project Browser as shown in the attached image. You can measure the OSNR using the WDM Analyzer Visualizer at Default/Visualizer Library/Optical/
Regards,
Ahmad

Attachments:

1. 

   OFDM-Demodulation-Constellation.png
   

+1

[mackenzie fencyParticipant]

Dear Ahmad:
Wow, it works! Thank u so much Mr. Atieh!
But after I used WDM analyzer, there still one question:
I used QPSK to build OFDM system, and the WDM analyzer always tells me signal power equals 0. Is this because of QPSK or because I used only one wavelength?
If there is an offense, please forgive me.
Mackenzie

[Ahmad AtiehModerator]

Dear Mackenzie,
there is no offense.
I am not sure what the settings for the component in your project are. So, I can’t comment. However, you may place a power meter at the same port and check the power. You may email me your project as a zip file to ahmad.atieh@optiwave.com and I would check it out and comment.
Meanwhile, please let me know which version of OptiSystem are you using and your affiliation.
Regards,
Ahmad

[mackenzie fencyParticipant]

okay, thank u Mr. Atieh!